Observation of an alternative χ_{c0}(2P) candidate in e^{+}e^{-}→J/ψDD[over ¯]

Authors

K. Chilikin et al., Belle Collaboration
D. Joffe, Kennesaw State UniversityFollow
Ratnappuli L. Kulasiri, Kennesaw State UniversityFollow

Department

Physics

Document Type

Article

Publication Date

6-2017

Embargo Period

7-3-2018

Abstract

We perform a full amplitude analysis of the process e+e−→J/ψD¯D, where D refers to either D0 or D+. A new charmoniumlike state X∗(3860) that decays to D¯D is observed with a significance of 6.5σ. Its mass is (3862+26−32 +40−13)  MeV/c2, and its width is (201+154−67 +88−82)  MeV. The JPC=0++ hypothesis is favored over the 2++ hypothesis at the level of 2.5σ. The analysis is based on the 980  fb−1 data sample collected by the Belle detector at the asymmetric-energy e+e− collider KEKB.

Journal Title

Physical Review D

Journal ISSN

2470-0010

Volume

95

Issue

11

Digital Object Identifier (DOI)

10.1103/PhysRevD.95.112003

Comments

Preprint.